Improved flue gas and coal gas preheater

Abstract

The utility model discloses an improved flue gas and coal gas preheater, and relates to the technical field of heat exchange equipment. The pre-heater comprises a pre-heater body, wherein the pre-heater body comprises a shell, a flue gas inlet, a flue gas discharge outlet, a coal gas inlet, a coal gas discharge outlet and a heat exchange element; a gas inlet channel is detachably mounted on the flue gas inlet, and a gas inlet control mechanism and a filtering assembly are arranged on the gas inlet channel; the air inlet control mechanism comprises a fixing ring; according to the flue gas and coal gas preheater, the filtering unit is arranged at the end of the gas inlet channel, high-temperature flue gas entering the shell is filtered through the filtering unit, impurities in the high-temperature flue gas are adsorbed through the filtering unit, the phenomenon that a heat exchange element is affected by a large number of impurities is avoided, and therefore the service life of the flue gas and coal gas preheater is prolonged; the air inlet pipe in the air inlet control unit is driven to swing in a reciprocating mode, high-temperature flue gas evenly enters the heat exchange element through reciprocating swing of the air inlet pipe, the high-temperature flue gas is prevented from being accumulated at a certain position of the heat exchange element, and therefore the heat exchange effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, specifically an improved flue gas preheater. Background Technology

[0002] A gas preheater is a device used to improve combustion efficiency. It heats the gas before combustion to a suitable temperature, allowing for more complete combustion and thus reducing energy waste and environmental pollution. Gas preheaters are commonly used in industrial production equipment such as boilers and hot blast stoves to improve energy utilization.

[0003] The working principle of a gas preheater is to use the high-temperature flue gas emitted during combustion to heat the gas before combustion. During combustion, the flue gas produced contains a large amount of heat energy. Through the gas preheater, this heat energy can be recovered and used to heat the gas entering the combustion chamber, increasing the temperature of the gas, making combustion more complete, and reducing fuel consumption.

[0004] However, existing flue gas preheaters still have some drawbacks:

[0005] 1. When high-temperature flue gas is introduced into the flue gas preheater for heat exchange, the high-temperature flue gas contains a lot of impurities, which are easy to adhere to the heat exchange elements, thus affecting the service life of the flue gas preheater.

[0006] 2. In existing technologies, when high-temperature flue gas is introduced into a flue gas heat exchanger, the high-temperature flue gas tends to accumulate in a certain part of the heat exchange element, which results in the high-temperature flue gas not being evenly distributed in the heat exchange element, thus affecting the heat exchange effect of the flue gas. Utility Model Content

[0007] In order to solve the above problems, the purpose of this utility model is to provide an improved flue gas preheater.

[0008] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: an improved flue gas and coal gas preheater, comprising a preheater body, wherein the preheater body comprises a shell, a flue gas inlet, a flue gas outlet, a coal gas inlet, a coal gas outlet, and heat exchange elements;

[0009] The flue gas inlet is detachably equipped with an air intake channel, and the air intake channel is respectively provided with an air intake control mechanism and a filter assembly;

[0010] The intake control mechanism includes a fixed ring, which is fixedly installed on the inner wall of the intake channel. A hose is fixedly installed on one side of the fixed ring, and an intake pipe is fixedly installed at one end of the hose. Two rotating shafts are rotatably installed at one end of the intake channel, and one end of the two rotating shafts is fixedly connected to the outer wall of the intake pipe.

[0011] A motor is fixedly installed on the outer wall of the air intake channel. A rotating rod is fixedly installed on the drive output end of the motor. A rotating handle is fixedly installed on one end of the rotating rod. A push-pull shaft is fixedly installed on one end of the rotating handle. A swing handle is fixedly installed on the other end of one of the rotating shafts. A movable groove is opened on the swing handle. One end of the push-pull shaft and one end of the movable groove are in movable contact.

[0012] Preferably, a connecting flange is fixedly connected to the flue gas inlet, and a fixed flange is fixedly connected to one end of the air intake channel. A plurality of fixed bolts arranged in a ring array are rotatably installed on the fixed flange, and the fixed bolts are threadedly connected to the connecting flange.

[0013] Preferably, an L-shaped mounting bracket is fixedly installed at the fixed end of the motor, and one end of the L-shaped mounting bracket is fixedly connected to the outer wall of the air intake channel.

[0014] Preferably, the filter assembly includes a filter unit, which is detachably installed on the inner wall of the air intake channel. A sealing ring is fixedly installed on the side of the retaining ring away from the hose, and one side of the filter unit and one side of the sealing ring are in contact.

[0015] Preferably, a plurality of fixing plates are fixedly installed on the outer wall of the air intake channel. The plurality of fixing plates are arranged in a ring array and fixed on the outer wall of the air intake channel. A rotating shaft is rotatably installed between each two adjacent fixing plates. A fixing seat is fixedly installed in the middle of each of the plurality of rotating shafts. A locking block is fixedly installed on the outer wall of each of the plurality of fixing seats. The end of the locking block away from the fixing seat is in contact with the side of the filter unit away from the sealing ring.

[0016] Preferably, torsion springs are movably sleeved at both ends of several of the rotating shafts, one end of the torsion spring is fixedly connected to one side of the fixing plate, and the other end of the torsion spring is fixedly connected to one end of the fixing seat.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] 1. In this utility model, by setting a filter unit at the end of the air inlet channel, the filter unit filters the high-temperature flue gas entering the shell, adsorbs impurities in the high-temperature flue gas, avoids the influence of too many impurities on the heat exchange elements, and thus improves the service life of the flue gas preheater.

[0019] 2. In this utility model, by driving the intake pipe in the intake control unit to swing back and forth, the back and forth swing of the intake pipe allows the high-temperature flue gas to enter the heat exchange element evenly, avoiding the accumulation of high-temperature flue gas in a certain place of the heat exchange element, thereby improving the heat exchange effect.

[0020] 3. In this utility model, by making the locking block flip-up, the locking block can be fastened to the front side of the filter unit or detached from the front side of the filter unit, thereby realizing the installation or removal of the locking block, which facilitates the replacement of the filter unit and effectively improves the convenience of replacing the filter unit. Attached Figure Description

[0021] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0022] Figure 1 This is a front view of an improved flue gas preheater according to the present invention.

[0023] Figure 2 This is a schematic diagram of the connection structure between the air intake channel and the housing of this utility model.

[0024] Figure 3 This is a schematic diagram of the separation structure of the air intake channel and the housing of this utility model.

[0025] Figure 4 This is a schematic diagram of the separation structure of the filter unit and the air intake channel of this utility model.

[0026] Figure 5 This is a cross-sectional structural diagram of the air intake channel of this utility model.

[0027] Figure 6 This utility model Figure 5 Enlarged schematic diagram of part A in the diagram.

[0028] Figure 7 This is a schematic diagram showing the separation structure of the filter unit, sealing ring, hose, and fixing ring of this utility model.

[0029] In the diagram: 1. Preheater body; 11. Shell; 12. Flue gas inlet; 121. Connecting flange; 13. Flue gas outlet; 14. Gas inlet; 15. Gas outlet; 16. Heat exchange element; 2. Inlet channel; 21. Fixed flange; 22. Fixed bolt; 3. Inlet control mechanism; 31. Fixed ring; 32. Hose; 33. Inlet pipe; 34. Rotating shaft; 35. Motor; 36. Rotating rod; 37. Rotating handle; 38. Push-pull shaft; 39. Swing handle; 4. Movable groove; 41. L-shaped fixing frame; 5. Filter assembly; 51. Filter unit; 52. Sealing ring; 53. Fixing plate; 54. Rotating shaft; 55. Fixing seat; 56. Locking block; 57. Torsion spring. Detailed Implementation

[0030] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0031] Example: Figure 1-7 As shown, this utility model provides an improved flue gas and coal gas preheater, including a preheater body 1. The preheater body 1 includes a shell 11, a flue gas inlet 12, a flue gas outlet 13, a coal gas inlet 14, a coal gas outlet 15, and a heat exchange element 16.

[0032] A flue gas inlet 12 is located at one end of the shell 11, a flue gas outlet 13 is located at the other end of the shell 11, a coal gas inlet 14 and a coal gas outlet 15 are located at the upper part of the shell 11, and a heat exchange element 16 is located inside the shell 11. Several sets of heat exchange elements 16 are arranged. The coal gas inlet 14 and the coal gas outlet 15 are connected to the heat exchange element 16. The heat exchange element 16 is composed of multiple corrugated plates stacked into a plate bundle, through which high-temperature flue gas and coal gas pass, and heat exchange is performed between the high-temperature flue gas and coal gas. The high-temperature flue gas and coal gas enter the shell 11 through the flue gas inlet 12 and the coal gas inlet 14, pass through the heat exchange element 16, and the flue gas after heat exchange through the heat exchange element 16 is discharged through the flue gas outlet 13. The coal gas after heat exchange is discharged to the external boiler through the coal gas outlet 15. This is the prior art and will not be described in detail here.

[0033] An intake channel 2 is detachably installed on the flue gas inlet 12. The intake channel 2 is equipped with an intake control mechanism 3 and a filter assembly 5. By setting the intake control mechanism 3 and the filter assembly 5, the filter assembly 5 can filter the incoming high-temperature flue gas, avoiding the impact of too many impurities on the heat exchange element 16, thereby improving the service life of the flue gas preheater. The intake control mechanism 3 can make the incoming high-temperature flue gas enter the heat exchange element 16 in an oscillating state, avoiding the accumulation of high-temperature flue gas in one place and improving the heat exchange effect.

[0034] The intake control mechanism 3 includes a fixing ring 31, which is fixedly installed on the inner wall of the intake channel 2. A hose 32 is fixedly installed on one side of the fixing ring 31, and an intake pipe 33 is fixedly installed on one end of the hose 32. Two rotating shafts 34 are rotatably installed on one end of the intake channel 2. One end of the two rotating shafts 34 is fixedly connected to the outer wall of the intake pipe 33. The high-temperature flue gas entering the intake channel 2 can enter the housing 11 through the hose 32 and the intake pipe 33.

[0035] A motor 35 is fixedly mounted on the outer wall of the air intake channel 2. An L-shaped bracket 41 is fixedly mounted on the fixed end of the motor 35. One end of the L-shaped bracket 41 is fixedly connected to the outer wall of the air intake channel 2. A rotating rod 36 is fixedly mounted on the drive output end of the motor 35. A rotating handle 37 is fixedly mounted on one end of the rotating rod 36. A push-pull shaft 38 is fixedly mounted on one end of the rotating handle 37. A swing handle 39 is fixedly mounted on the other end of one of the rotating shafts 34. A movable groove 4 is provided on the swing handle 39. One end of 38 is in contact with one end of the movable slot 4. By turning on the motor 35, the drive shaft of the motor 35 can cause the rotating handle 37 to revolve around the axis of the rotating rod 36 through the rotating rod 36. The rotating handle 37 can cause the swing handle 39 to reciprocate around the axis of the rotating shaft 34 through the cooperation of the push-pull shaft 38 and the movable slot 4. The reciprocating swing of the swing handle 39 can cause the rotating shaft 34 to rotate back and forth. The reciprocating rotation of the rotating shaft 34 can cause the air intake pipe 33 to swing back and forth.

[0036] A connecting flange 121 is fixedly connected to the flue gas inlet 12, and a fixed flange 21 is fixedly connected to one end of the air intake channel 2. Several fixed bolts 22 arranged in a ring are rotatably installed on the fixed flange 21. The fixed bolts 22 and the connecting flange 121 are threadedly connected. By setting the fixed flange 21 and the fixed bolts 22, it is easy to fix the air intake channel 2 at the end of the flue gas inlet 12.

[0037] The filter assembly 5 includes a filter unit 51, which is detachably installed on the inner wall of the air intake channel 2. A sealing ring 52 is fixedly installed on the side of the fixing ring 31 away from the hose 32. One side of the filter unit 51 and one side of the sealing ring 52 are in contact. By setting the sealing ring 52, the sealing performance can be improved when the filter unit 51 is fixed on the inner wall of the air intake channel 2. The filter unit 51 is composed of multiple filter screens, which can adsorb impurities in high-temperature flue gas.

[0038] Several fixing plates 53 are fixedly installed on the outer wall of the air intake channel 2. The fixing plates 53 are arranged in a ring array and fixed on the outer wall of the air intake channel 2. A rotating shaft 54 ​​is rotatably installed between two adjacent fixing plates 53. A fixing seat 55 is fixedly installed in the middle of each of the rotating shafts 54. A locking block 56 is fixedly installed on the outer wall of each fixing seat 55. The end of the locking block 56 away from the fixing seat 55 is in contact with the side of the filter unit 51 away from the sealing ring 52. By setting the locking block 56, when the end of the locking block 56 is fastened to the filter unit 51, the filter unit 51 can be locked to the inner wall of the air intake channel 2, so as to facilitate the installation of the filter unit 51. Conversely, the filter unit 51 can be disassembled, making it convenient for operators to replace the filter unit 51.

[0039] Several rotating shafts 54 are movably fitted with torsion springs 57 at both ends. One end of the torsion spring 57 is fixedly connected to one side of the fixing plate 53, and the other end of the torsion spring 57 is fixedly connected to one end of the fixing seat 55. By setting the torsion spring 57, the torsion spring 57 can initially lock the locking block 56 onto the filter unit 51 through the fixing seat 55. When the locking block 56 is pulled in the opposite direction, the locking block 56 rotates around the axis of the rotating shaft 54 ​​through the fixing seat 55, the torsion spring 57 deforms, and the locking block 56 disengages from the filter unit 51.

[0040] Working principle: When heat exchange is required between temperature-sensitive flue gas and coal gas, high-temperature flue gas enters the shell 11 through the inlet channel 2, inlet pipe 33 and flue gas inlet 12, and coal gas enters the shell 11 through the coal gas inlet 14 and undergoes heat exchange through the heat exchange element 16.

[0041] During this process, the high-temperature flue gas passes through the filter unit 51, which filters the high-temperature flue gas and adsorbs impurities in the high-temperature flue gas, avoiding the impact of too many impurities on the heat exchange element 16, thereby improving the service life of the flue gas preheater.

[0042] At the same time, the operator starts the motor 35. The drive shaft of the motor 35 causes the rotating handle 37 to revolve around the axis of the rotating handle 36 via the rotating rod 36. The rotating handle 37, through the cooperation of the push-pull shaft 38 and the movable groove 4, causes the swing handle 39 to reciprocate around the axis of the rotating shaft 34. The swing handle 39 causes the rotating shaft 34 to rotate back and forth, and the rotating shaft 34 causes the air inlet pipe 33 to swing back and forth. The reciprocating swing of the air inlet pipe 33 allows the high-temperature flue gas to enter the heat exchange element 16 evenly, avoiding the accumulation of high-temperature flue gas in a certain place in the heat exchange element 16, thereby improving the heat exchange effect.

[0043] When the filter unit 51 needs to be replaced, the operator pulls multiple locking blocks 56 simultaneously, causing the locking blocks 56 to rotate around the axis of the rotating shaft 54 ​​via the fixed base 55. The torsion spring 57 deforms, and the locking blocks 56 disengage from the outer surface of the filter unit 51. Then, the filter unit 51 is taken out from the end of the air intake channel 2, and the replaced filter unit 51 is placed at the end of the air intake channel 2. The locking blocks 56 are used to lock the filter unit 51 at the end of the air intake channel 2, thus facilitating the replacement of the filter unit 51 and effectively improving the convenience of replacing the filter unit 51.

[0044] Obviously, those skilled in the art may make various modifications and variations to the present invention without departing from the spirit and scope of the present invention. Thus, if such modifications and variations fall within the scope of the claims of the present invention and their equivalents, the present invention is intended to include such modifications and variations.

Claims

1. An improved flue gas preheater, comprising a preheater body (1), characterized in that: The preheater body (1) includes a shell (11) and a flue gas inlet (12), the flue gas inlet (12) being located at one end of the shell (11); The flue gas inlet (12) is detachably equipped with an air intake channel (2), and the air intake channel (2) is respectively provided with an air intake control mechanism (3) and a filter assembly (5). The intake control mechanism (3) includes a fixing ring (31), which is fixedly installed on the inner wall of the intake channel (2). A hose (32) is fixedly installed on one side of the fixing ring (31), and an intake pipe (33) is fixedly installed at one end of the hose (32). Two rotating shafts (34) are rotatably installed at one end of the intake channel (2), and one end of the two rotating shafts (34) is fixedly connected to the outer wall of the intake pipe (33). A motor (35) is fixedly installed on the outer wall of the air intake channel (2). A rotating rod (36) is fixedly installed on the drive output end of the motor (35). A rotating handle (37) is fixedly installed on one end of the rotating rod (36). A push-pull shaft (38) is fixedly installed on one end of the rotating handle (37). A swing handle (39) is fixedly installed on the other end of one of the rotating shafts (34). A movable groove (4) is opened on the swing handle (39). One end of the push-pull shaft (38) and one end of the movable groove (4) are in movable contact.

2. The improved flue gas preheater as described in claim 1, characterized in that, A connecting flange (121) is fixedly connected to the flue gas inlet (12), and a fixed flange (21) is fixedly connected to one end of the air intake channel (2). A number of fixed bolts (22) arranged in a ring array are threadedly installed on the fixed flange (21), and the fixed bolts (22) and the connecting flange (121) are threadedly connected.

3. An improved flue gas preheater as described in claim 1, characterized in that, The motor (35) is fixedly mounted with an L-shaped bracket (41), and one end of the L-shaped bracket (41) is fixedly connected to the outer wall of the air intake channel (2).

4. An improved flue gas preheater as described in claim 1, characterized in that, The filter assembly (5) includes a filter unit (51), which is detachably installed on the inner wall of the air intake channel (2). A sealing ring (52) is fixedly installed on the side of the fixing ring (31) away from the hose (32). One side of the filter unit (51) and one side of the sealing ring (52) are in contact.

5. An improved flue gas preheater as described in claim 4, characterized in that, A number of fixing plates (53) are fixedly installed on the outer wall of the air intake channel (2). The fixing plates (53) are arranged in a ring array and fixed on the outer wall of the air intake channel (2). A rotating shaft (54) is rotatably installed between two adjacent fixing plates (53). A fixing seat (55) is fixedly installed in the middle of the rotating shaft (54). A locking block (56) is fixedly installed on the outer wall of the fixing seat (55). The end of the locking block (56) away from the fixing seat (55) is in contact with the side of the filter unit (51) away from the sealing ring (52).

6. An improved flue gas preheater as described in claim 5, characterized in that, Several of the rotating shafts (54) are movably fitted with torsion springs (57) at both ends. One end of the torsion spring (57) is fixedly connected to one side of the fixing plate (53), and the other end of the torsion spring (57) is fixedly connected to one end of the fixing seat (55).

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